The mother of an Australian boy who choked to death on a bouncy ball he received for his 4th birthday has penned a heartwrenching tribute to him on social media.

Alby Davis, from Tasmania, passed away on Monday afternoon – after playing with the ball that had arrived earlier that morning in a package filled with party favours for his upcoming birthday.

‘The ball became stuck in his windpipe, preventing his ability to breathe, and in a matter of seconds, despite his mama's frantic attempts to save him, he passed away in her arms,’ a family friend wrote on a GoFundMe page set up for the devastated family.

On Tuesday, Alby’s mother, Anna - who runs a toy business called The Small Folk - paid tribute to her son.

Later, she uploaded a photograph of Alby – taken just 40 minutes before he died – showing him excitedly snuggled beneath a new doona cover he had received.

‘“I can’t wait to go to bed tonight Mum!” Our precious boy, with his brand new doona cover, 2.49pm on Monday afternoon... exactly 40 minutes before he took his final earthside breath in my arms,’ Anna wrote.

‘No words could ever express the depths of our gratitude for the outpouring of love we have received since our worst nightmare became our daily reality.